print("");

# 1.类型转换
list_demo = list("hello world");
print("字符串转list -> %s" %(list("hello world")))
a = tuple(list("hello world"))
print("字符串转tuple -> %s" %("11"))
print("字符串转set -> %s" %(set("hello world")))
tuple_demo = ('小', '白')
print("tuple转str -> %s" %str(tuple_demo))

list_demo_1 = ["小", "白"]
print("tuple转str -> %s" %str(list_demo_1))